---How long has the factory _______?
---Since three years ago.
A. open B. be open
C. been open D. been opened
It’s a secret. You _____ tell anyone about it.
A. mustn’t B. must C. can D. needn’t
I didn’t hear you because I ____ a shower at that moment.
A. have taken B. will take
B. C. was taking D. am talking
It _____five months since I came to America.
A. was B. is C. will be D. had been
That piece of music created by the new singer sounds . We all like it.
A. terrible B. terribly C. wonderfully D. wonderful
They all looked _____ me _____ surprise, but I didn’t know why?
A. for, to B. by, for C. up, over D. at, in
